Illumination device and light-emitting module

Abstract

An illumination device includes a first light source that emits first light having a first peak wavelength which is highest in intensity in a wavelength range from near-ultraviolet to green in an emission spectrum; a second light source that emits second light having a second peak wavelength which is highest in intensity in a wavelength range from near-ultraviolet to green in an emission spectrum, the second light illuminating a position identical to a position illuminated by the first light; and a detection device that detects whether an object is present at a given position, wherein the second peak wavelength is shorter than the first peak wavelength, and a luminous flux of the first light is decreased and a luminous flux of the second light is increased when the detection device detects that the object is present at the predetermined position.

The invention claimed is: 
     
       1. An illumination device comprising:
 a first light source that emits first light having a first peak wavelength which is highest in intensity in a wavelength range from near-ultraviolet to green in an emission spectrum; 
 a second light source that emits second light having a second peak wavelength which is highest in intensity in a wavelength range from near-ultraviolet to green in an emission spectrum, the second light illuminating a position identical to a position illuminated by the first light; 
 a detection device that detects whether an object is present at a given position; 
 a first optical component that includes a first lens and guides or condenses the first light; and 
 a second optical component that includes a second lens and guides or condenses the second light, wherein: 
 the second peak wavelength is shorter than the first peak wavelength, and 
 a luminous flux of the first light is decreased and a luminous flux of the second light is increased when the detection device detects that the object is present at the given position. 
 
     
     
       2. The illumination device according to  claim 1 , further comprising:
 a lamp body including the first light source, the first optical component, the second light source, and the second optical component, wherein 
 a scotopic luminance of light emitted by the lamp body when the detection device detects that the object is present is lower than a scotopic luminance of light emitted by the lamp body when the detection device does not detect that the object is present. 
 
     
     
       3. The illumination device according to  claim 1 , wherein
 the first peak wavelength is at least 450 nm, and 
 the second peak wavelength is less than 450 nm. 
 
     
     
       4. The illumination device according to  claim 1 , wherein
     I   2   /I   1 <2.00×10 −3 ×(λ 2 −443) 2 +1.00
 
 is satisfied where I 1  denotes a radiant flux of the first light, I 2  denotes a radiant flux of the second light, and λ 2  denotes the second peak wavelength. 
 
     
     
       5. The illumination device according to  claim 1 , wherein
 when the detection device detects that the object is present,
 the first light source changes from an ON state to an OFF state, and 
 the second light source changes from an OFF state to an ON state. 
 
 
     
     
       6. The illumination device according to  claim 1 , further comprising:
 a lamp body including the first light source, the first optical component, the second light source, and the second optical component, wherein 
 a luminous flux of light emitted by the lamp body when the detection device detects that the object is present is higher than 50% of a luminous flux of light emitted by the lamp body when the detection device does not detect that the object is present. 
 
     
     
       7. The illumination device according to  claim 1 , wherein
     I   2   /I   1 >7.84×10 −4 ×(λ 2 −439) 2 +5.05×10 −1  
 
 is satisfied where I 1  denotes a radiant flux of the first light, I 2  denotes a radiant flux of the second light, and λ 2  denotes the second peak wavelength. 
 
     
     
       8. An illumination device comprising:
 a first light source that emits first light having a first peak wavelength which is highest in intensity in a wavelength range from near-ultraviolet to green in an emission spectrum; 
 a second light source that emits second light having a second peak wavelength which is highest in intensity in a wavelength range from near-ultraviolet to green in an emission spectrum, the second light illuminating a position identical to a position illuminated by the first light; and 
 a detection device that detects whether an object is present at a given position, wherein 
 the second peak wavelength is shorter than the first peak wavelength, and 
 a luminous flux of the first light is decreased and a luminous flux of the second light is increased when the detection device detects that the object is present at the given position, wherein: 
 both the first peak wavelength and the second peak wavelength are at least 413 nm and at most 505 nm, and
     F   2   /F   1 <(20×λ 1 −8250)/(20×λ 2 −8250)
 
 
 is satisfied where F 1  denotes a peak intensity of the first peak wavelength, λ 1  denotes the first peak wavelength, F 2  denotes a peak intensity of the second peak wavelength, and λ 2  denotes the second peak wavelength. 
 
     
     
       9. The illumination device according to  claim 8 , further comprising:
 a lamp body including the first light source, a first optical component that guides or condenses the first light, the second light source, and a second optical component that guides or condenses the second light, wherein 
 a scotopic luminance of light emitted by the lamp body when the detection device detects that the object is present is lower than a scotopic luminance of light emitted by the lamp body when the detection device does not detect that the object is present. 
 
     
     
       10. The illumination device according to  claim 8 , wherein
 the first peak wavelength is at least 450 nm, and 
 the second peak wavelength is less than 450 nm. 
 
     
     
       11. The illumination device according to  claim 8 , wherein
     I   2   /I   1 <2.00×10 −3 ×(λ 2 −443) 2 +1.00
 
 is satisfied where I 1  denotes a radiant flux of the first light, I 2  denotes a radiant flux of the second light, and λ 2  denotes the second peak wavelength. 
 
     
     
       12. The illumination device according to  claim 8 , wherein
 when the detection device detects that the object is present,
 the first light source changes from an ON state to an OFF state, and 
 the second light source changes from an OFF state to an ON state. 
 
 
     
     
       13. The illumination device according to  claim 8 , further comprising:
 a lamp body including the first light source, a first optical component that guides or condenses the first light, the second light source, and a second optical component that guides or condenses the second light, wherein 
 a luminous flux of light emitted by the lamp body when the detection device detects that the object is present is higher than 50% of a luminous flux of light emitted by the lamp body when the detection device does not detect that the object is present. 
 
     
     
       14. The illumination device according to  claim 8 , wherein
     I   2   /I   1 >7.84×10 −4 ×(λ 2 −439) 2 +5.05×10 −1  
 
 is satisfied where I 1  denotes a radiant flux of the first light, I 2  denotes a radiant flux of the second light, and λ 2  denotes the second peak wavelength. 
 
     
     
       15. An illumination device comprising:
 a first light source that emits first light having a first peak wavelength which is highest in intensity in a wavelength range from near-ultraviolet to green in an emission spectrum; 
 a second light source that emits second light having a second peak wavelength which is highest in intensity in a wavelength range from near-ultraviolet to green in an emission spectrum, the second light illuminating a position identical to a position illuminated by the first light; and 
 a detection device that detects whether an object is present at a given position, wherein 
 the second peak wavelength is shorter than the first peak wavelength, and 
 a luminous flux of the first light is decreased and a luminous flux of the second light is increased when the detection device detects that the object is present at the given position, 
 wherein both the first peak wavelength and the second peak wavelength are at least 420 nm and at most 470 nm. 
 
     
     
       16. The illumination device according to  claim 15 , further comprising:
 a lamp body including the first light source, a first optical component that guides or condenses the first light, the second light source, and a second optical component that guides or condenses the second light, wherein 
 a scotopic luminance of light emitted by the lamp body when the detection device detects that the object is present is lower than a scotopic luminance of light emitted by the lamp body when the detection device does not detect that the object is present. 
 
     
     
       17. The illumination device according to  claim 15 , wherein
 the first peak wavelength is at least 450 nm, and 
 the second peak wavelength is less than 450 nm. 
 
     
     
       18. The illumination device according to  claim 15 , wherein
     I   2   /I   1 <2.00×10 −3 ×(λ 2 −443) 2 +1.00
 
 is satisfied where I 1  denotes a radiant flux of the first light, I 2  denotes a radiant flux of the second light, and λ 2  denotes the second peak wavelength. 
 
     
     
       19. The illumination device according to  claim 15 , wherein
 when the detection device detects that the object is present,
 the first light source changes from an ON state to an OFF state, and 
 the second light source changes from an OFF state to an ON state. 
 
 
     
     
       20. The illumination device according to  claim 15 , further comprising:
 a lamp body including the first light source, a first optical component that guides or condenses the first light, the second light source, and a second optical component that guides or condenses the second light, wherein 
 a luminous flux of light emitted by the lamp body when the detection device detects that the object is present is higher than 50% of a luminous flux of light emitted by the lamp body when the detection device does not detect that the object is present. 
 
     
     
       21. The illumination device according to  claim 15 , wherein
     I   2   /I   1 >7.84×10 −4 ×(λ 2 −439) 2 +5.05×10 −1  
 
 is satisfied where I 1  denotes a radiant flux of the first light, I 2  denotes a radiant flux of the second light, and λ 2  denotes the second peak wavelength.